Add WM_EVENT_TRUSTED_PIN and WINDOW_STATE_TYPE_TRUSTED_PINNED to Ash.

ash/common/wm/wm_event.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ASH_COMMON_WM_WM_EVENT_H_
 #define ASH_COMMON_WM_WM_EVENT_H_
 
 #include "ash/ash_export.h"
 #include "ash/common/wm/wm_types.h"
 #include "base/macros.h"
@@ skipping 73 matching lines @@
 
   // Bounds of the display has changed.
   WM_EVENT_DISPLAY_BOUNDS_CHANGED,
 
   // Bounds of the work area has changed. This will not occur when the work
   // area has changed as a result of DISPLAY_BOUNDS_CHANGED.
   WM_EVENT_WORKAREA_BOUNDS_CHANGED,
 
   // A user requested to pin a window.
   WM_EVENT_PIN,
+
+  // A user requested to pin a window for a trusted application. This is similar
+  // WM_EVENT_PIN but does not allow user to exit the mode by shortcut key.
+  WM_EVENT_TRUSTED_PIN,
 };
 
 class ASH_EXPORT WMEvent {
  public:
   explicit WMEvent(WMEventType type);
   virtual ~WMEvent();
 
   WMEventType type() const { return type_; }
 
  private:
@@ skipping 12 matching lines @@
  private:
   gfx::Rect requested_bounds_;
 
   DISALLOW_COPY_AND_ASSIGN(SetBoundsEvent);
 };
 
 }  // namespace wm
 }  // namespace ash
 
 #endif  // ASH_COMMON_WM_WM_EVENT_H_